Agree with the rest of your post, mate, but not this - at least not entirely.
Do I want to see Ben Davies and Emerson as our CB's in the PL? Bloody hell, no!
But I think you are being unduly critical of the two who were playing only their 2nd game together against (arguably) the best and most free-scoring team in Europe.
Did they make mistakes? Yes, no question. Did they get pulled out of position? Yes, no question.
But a) they worked their socks off and b) maybe more by luck than judgement, they kept the PL's top goalscorer off the scoresheet.
And only one of the 3 City goals was down to them.
Am I critical of the club not providing better cover for these scenarios? Damn right, I am! But will I be harsh on the two stand-ins who have done their best in a team that as a whole has shown more fight and commitment than almost any group of Spurs players in my memory? Absolutely not!
Maybe I'm putting on rose-tinted glasses because I am really buying into the Ange revolution, but I'm going to refrain from attacking these two individuals right now.